Got to lvl 13 before being swarmed by a million of those speedy green balls.
Loved every moment of it though, I kept finding out new things about the mechanics, like the way you can overheat a coil and cause it to explode, but doing that also makes it so that you lose a coil in that area that you were using, so you have to be strategic. The fact that you have so many different upgrades & stuff was really unexpected and really awesome.
I think if someone asks me if they can make good games but have no art knowledge, I'd send them this. This game is so chalk full of good ideas, that your presentation would just need a bit of work and it'd be a really good game. Presentation isn't as hard as people say either, you could invest some cash if you wanted and have something looking pretty great within a week, finding a good game-loop requires intuition, knowledge n a bit of a luck.
Great game over-all, you should be up there in the top 100 tbh.
Would appreciate you giving ours a looksie n sharing thoughts/rating as well :)